Calculations of antiproton nucleus quasi-bound states using the Paris (N)over-barN potential

0486475 - ÚJF 2019 RIV NL eng J - Článek v odborném periodiku
Óbertová, Jaroslava - Mareš, Jiří
Calculations of antiproton nucleus quasi-bound states using the Paris (N)over-barN potential.
Nuclear Physics. A. Roč. 969, č. 1 (2018), s. 45-59. ISSN 0375-9474. E-ISSN 1873-1554
Grant CEP: GA ČR(CZ) GA15-04301S
Institucionální podpora: RVO:61389005
Klíčová slova: antiproton-nucleus interaction * Paris (N)over-barN potential * antiproton-nuclear bound states
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 1.463, rok: 2018

An optical potential constructed using the (p) over barN scattering amplitudes derived from the 2009 version of the Paris (N) over barN potential is applied in calculations of (p) over bar quasi-bound states in selected nuclei across the periodic table. A proper self-consistent procedure for treating energy dependence of the amplitudes in a nucleus appears crucial for evaluating (p) over bar binding energies and widths. Particular attention is paid to the role of P-wave amplitudes. While the P-wave potential nearly does not affect calculated (p) over bar binding energies, it reduces considerably the corresponding widths. The Paris S-wave potential supplemented by a phenomenological P-wave term yields in dynamical calculations (p) over bar binding energies B-(p) over bar approximate to 200 MeV and widths Gamma((p) over bar) similar to 200-230 MeV, which is very close to the values obtained within the RMF model consistent with (p) over bar -atom data.
Trvalý link: http://hdl.handle.net/11104/0281351